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<H3><A NAME="9_3_2">9.3.2 Adjusting the radius scale</A></H3>
<P> The radius axis can be shown in either a linear or logarithmic
 scale. This is controlled, as usual, by a call to <A href="../ref/PolarGraph.html#_POLARGRAPH_SETSCALE">
PolarGraph::SetScale()</A> The two examples below show the same plot in
 either linear or logarithmic scale</P>
<P><DIV class="example">
<BR> <A href="exframes/frame_polarex3.html" target="blank"><IMG border="0"
HEIGHT="300"  src="img/polarex3.png" WIDTH="300"></A>
<BR><B>Figure 137:</B> Using a logarithmic scale <A href="exframes/frame_polarex3.html"
target="blank">[src]</A>&nbsp;
<P></P>
</DIV></P>
<P></P>
<P><DIV class="example">
<BR> <A href="exframes/frame_polarex3-lin.html" target="blank"><IMG border="0"
HEIGHT="300"  src="img/polarex3-lin.png" WIDTH="300"></A>
<BR><B>Figure 138:</B> Using a linear scale <A href="exframes/frame_polarex3-lin.html"
target="blank">[src]</A>&nbsp;
<P></P>
</DIV></P>
<P></P>
<P> Please note that the maximum values of the scales are different.</P>
<P> By default the scale will be auto scaled depending on the data. You
 can also specify a manual scale by supplying an extra argument to the
 SetScale() value. The only difference from the manual scaling with the
 other X-Y-graphs is that for polar graph you only specify a manual
 maximum. The minimum will always be 0 for the linear scale and a scaled
 value of 10 (i.e 1, 0.1, 0.001 and so on) for the logarithmic scale.</P>
<P> The plot is clipped to the plot area so if you specify a smaller
 scale then the maximum value that part of the plot that are outside the
 plot area will be clipped.</P>
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